Switching devices and distributed power flow control transmission line matched with fault current limiter
A switchgear, transmission tower technology, applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve problems such as excessive fault current, achieve high reliability, control The problem of fault current exceeding the standard and the effect of simple structure
Inactive Publication Date: 2018-02-09
NARI TECH CO LTD +3
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Problems solved by technology
[0005] In order to solve the above problems of power flow control and fault current exceeding the standard, the present invention provides a switchgear and a distributed power flow control transmission line that cooperates with a fault current limiter
Method used
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[0021] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0022] Such as figure 1 As shown, the switching device has the function of: transferring the current carried by the N split wire to the N+1 split wire, or transferring the current carried by the N+1 split wire to the N split wire, where N≥2.
[0023] Such as figure 2 As shown, the specific structure of the switching device that transfers the current conveyed by the N split wires to the N+1 split wires is as follows: it includes a confluence device and N+1 switching units, and the input end of the confluence device is connected to the N sub wires of the N split wires , the output end of the confluence device is connected to the input ends of the N+1 switching units, and the output ends of the ...
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The invention discloses a switching device and a distributed power flow control transmission line matched with a fault current limiter. The switching device transfers current delivered by N split conductors onto (N+1) split conductors or transfers current delivered by the (N+1) split conductors to the N split conductors, wherein N is larger than or equal to 2. Since the switching device can transfer the current delivered by the N split conductors onto the (N+1) split conductors or transfer the current delivered by the (N+1) split conductors to the N split conductors, the adjustment range of the impedance of the line can be expanded, and thereby, the direction of the power flow of the line can be changed, and power flow control can be realized; and the structure of the switching device is simple. The distributed power flow control transmission line has a power flow control function and can operate in cooperation with the fault current limiter so as to better address the problem of the standard exceeding of fault current.
Description
technical field [0001] The invention relates to a switch device and a distributed power flow control transmission line matched with a fault current limiter, belonging to the field of electrical engineering. Background technique [0002] Since the concept of Unified Power Flow Controller (UPFC) was put forward, it immediately attracted people's attention, and various power flow control devices have been developed successively at home and abroad. The early projects put into operation abroad continued the multiple topology of three-phase voltage source converter units that were phase-shifted and stacked through transformers commonly used in the field of flexible AC transmission (FACTS) in the early days. Flat converter technology. The combination of series connection, three-level, multiplexing and modular technology of switching devices further improves the waveform quality, which is very suitable for slow and large-capacity fully-controlled switching devices using fundamental...
Claims
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IPC IPC(8): H02J3/06H02H9/02
CPCH02H9/02H02J3/06
Inventor 吴维宁侯凯隗华荣武迪朱石晶陈汹叶琳张静
Owner NARI TECH CO LTD